Jitsi Run Error

Hi.everyone
I Installed Jitsi via manual installation
I found this error , when I run the Jitsi video bridge :
./jvb.sh --host=localhost --domain=xxx.xxxx.xxxxx --port=5347 --secret=xxxxxxxxxx&

failed to find jitsi-defaults.properties
failed to find jitsi-default-overrides.properties
java.lang.IllegalArgumentException: hostname can’t be null
org.ice4j.ice.harvest.AwsCandidateHarvester.obtainEC2Addresses() String for public IP: null